Diaphragm pump



D. D. MYERS DIAPHRAGM PUMP Original Filed Oct. 10, 1921 Feb. 17, 1931.

INVENTOR. 00/1 0. Myers BY M ATTORNEY Patented Feb. 17, 1931 UNITED STATES PATENT OFFICE DON D. MYERS, OF TOLEDO, OHIO, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE TILLOT- SON MANUFACTURING COMPANY, OF TOLEDO, OHIO, A CORPORATION OF DELA- WARE DIAIBHRAGM PUMP Application filed October 10, 1921, Serial No. 506,690. Renewed/March 31, 1930.

This invention relates to diaphragm pumps for fluids, and has particular utility when applied to pumps for raisingliquids, and where a source of electrical energy is readily available. A valuable application of the invention is to motor vehicles where it is necessary to raise liquid fuel and oil to a level from which a gravity feed is, possible.

An object of the invention is to provide means for pumping the fuel by an electrically operated diaphragm in which the suction and force vibration are usually timed.

Another important object is to. provide apparatus in an electrical diaphragm operated pump wherein the electrical make and break of the device occurs at diflerent relative distances from the diaphragm thus permitting a greater amplitude of diaphragm movement.

An object also resides in the provision of a novel type of contact apparatus having particular utility in combinatidn with an electro magnet and diaphragm.

Still another object is contemplated in the utilization of improved parts in the structure of the flexible contact support whereby markedl eflicient operation is attained.

(d ther objects and objects relating to economies of manufacture and details of construction will become apparent from the following detaileddscription of an embodiment of my invention which may be preferred, in which Figure I is a vertical section through a portion of the device;

Figure II is a plan section on lines II-II of Figure I; I

Figure III is a plan section on lines III- III of Figure I; Y

FigureIV is a detail view of the movable armature members and contact plates taken on the line IVIV of Figure 11; and

Figure V isa diagrammatic view of the wiring circuits.

Referring to Figure I, there is disclosed an inverted cup casing 10 in which is mounted a solenoid 11, the core 12 of which has one end secured to the casing top 13 and the other end depending to "a oint adjacent the open end of the casing. he solenoid 11 is formed between fibre insulating plates 14.- and 15, and a metal plate 16 fixed to the core 12 holds the solenoid in position on the" core.

The base edge of the casing is outwardly flanged as at 17 to form a support for a coable armature 21 which has an upper section 22 of diminished diameter encircled by-\an insulating ring 23. The section 22 terminates in a stem 24 which enters and is movable axially within a similarly shapedhollow space 25 so thatthe movable core members 21 and 22 are not only properly guided in their up and down movement but also are connected magnetically with the fixed core 12.

Attached to the insulated plate 15, as by a screw 26, is an insulated holding block 27 for the contact members 28 and 29 which latter are attached to the block 27 by any suitable means, as, for example, the screw 26 and screw 30. The contact member 28 as indicated in detail in Figures II and IV, is formed of sheet metal flexible stamping apertured to include the movable armature member 22 and carries a contact 31 at its outer terminus. The contact member 29 secured to screw, 30 is formed of a section 32 of spring metal and a section 33 of more rigid material,

j the latter section carrying the contact 34 and a block armature 35 on the upper side of the.

extreme outer end. The section 32 terminates in bilateral prongs 36, which, when the two sections 32 and 33 are attached, as at- 37, extend beyond the point of attachment to secure proper resiliency and strength, and prevent buckling at the juncture of the plates. The armature 35, as illustrated in Figure I, extends upward beyond the contact 28 and is adapted to contact with an extendedportion 37 of plate 16,.which serves as a stop therefor, to limit upward movement thereof.

Figure IV illustrates the dimensions of the contact members 28 and 29 as regards the insulation ring 23.. It should be noted that the upper edge of the ring is cut away to form an annular ledge 38 and a pair of tongues 28 are provided on the contact member 28 so that movement of the contact member 28 down beyond a limiting point is prevented. On the other hand the member 29 has free movement on the ring 23.

The base member 18 serves both as a closure for the diaphragm chamber and also as a body for inlet and outlet channels 39 and 40. The inlet 39 connects through the nipple 41 to the main liquid tank and the outlet 40 through an L-coupling 42 with the gravity I reservoir. Ball valves 43 and 44 in inlet and outlet pipes 39 and 40, respectively, prevent reverse flow of liquid. As indicated the channel 39 is directly beneath the central position of the diaphragm 19 and the outlet conduit 40connects thereto between the ball valve 44 and diaphragm.

, The electrical connections are indicated in Figure I and Figure V. The solenoid wire 50 connects through an insulated binding 1 post 51 to a hand switch 52, and a current source 53, to ground, the other end of the solenoid wire connecting to the screw 26. The electrical circuit is made, after closure of switch 52 Figure I, from grounded battery 53 through switch 52, solenoid 11, contact member 28, contact 31, contact 34, contact plate 29 and screw to groundl After the plate 29 has moved the armature 35 into contact with the plate 16, the circuit will be through armature 35, and plate 16 to ground. A condenser 60 may be shunted around the contacts to prevent unduearcing.

The operation of the device is as follows. Closure of the switch 52 causes energization of the solenoid which in turn draws both the diaphragm 19 and the core elements 21, 22, 24 and also the contact armature 35. Movement upward of the diaphragm moves valve balls 43 and 44 toward the diaphragm cavity, thus closing the outlet and opening the inlet and drawing liquid into the diaphragm cavity. I I

Contacts 31 and 34 are closed during the initial movement, but before the diaphragm completes the upward movementwhich is limited by the design of the diaphragm or by contact of the movable core on the stationary core,-the armature35 engages the stop plate extension 37' thus arresting the contact 34 and through continued movement of contact 31, causing a break in the electrical C11- cuit; Thereupon the tensioned dia hragm aided by the weight of the movab e core, moves downwardly, closing valve 43 and forcing liquid out through valve 44 to the gravity tank or reservoir.

As soon as the contacts are separatedbreaking the electrical circuitthe flexible member .32 of the contact arm 29, carries the contact back to the normal initial position, so that, since contact arm 28 is held to the meaeae relatively slow movement of the diaphragm by reason of its engagement with ledge 38 on the movable core, an appreciable movement of the diaphragm occurs before the contacts 31 and 34 are again brought into engage ments. Were it not for this arrangement whereby contact is inade at one level and break is made at another there would be, no appreciable movement of the diaphragm other than a constant fluttering resulting in large energy waste and small pumping efficiency. I

diaphragm movement between contact and break may be varied widely depending upon the dimensions of the armature 35 and the points of attachment of the contact arms; also, that the rate of movement of the movable elements is variable with the spring tensions, and solenoid strength. Also, the valves shown are largely illustrative of the action, modification being readily substituted.

The device as described may be readily em ployed bodily for pumping fuel in an internal combustion engine from a low level main tank to a high level tank from which feed by gravity takes place to the engine carburetor.

While I have described a specific embodiment of my invention, the claims hereto a ppended read broadly as well as specifically on the involved structure.

I claim as my invention:

1. In an electro-magnetic motor, the combination of a solenoid; a plurality of armatures adjacent one, end of said solenoid and adapted to be energized thereby; one of said armatures being the actuating element of said -motor; an electrical contact member mounttact member mounted on said solenoid and adapted to engage said first named contact gnember to close a circuit through said soleno1d, said, second named contact member being normally in contact with one of said armatures and. movable therewith. 3. In an electro-magnetic motor, the combination of a solenoid; an armature mount-- ed on a movablesupport in operative relationship with said solenoid; a contact secured .to said armature support; a second armature mounted adjacent said solenoid; a contact support normally in engagement withsaid second named armature; a contact mounted It is of course apparent that the range of on said contact support normally engaging said first named contact, whereby a circuit is closed through said solenoid, one of said armatures having a range of movement greater than the other whereby said contacts are separated.

4. In a magnetic motor, the combination of a support; flexible plate members mounted on said support; interengaging contact members, one positioned on each plate normally forming a closed electrical circuit between said plates; an armature mounted on one of said plates; a second armature in operative relationship with the other of said plates; and electromagnetic means included in the circuit of said plates adapted to move said armatures, the movement of said second named armature being greater than that of the other.

5. In a' motor apparatus, the combination of a support; flexible plate members mount- 'ed on said support; interengaging contact members, one positioned on each plate normally forming a closed electrical circuit between said plates; an armature mounted on one of said plates; a second armature in operative relationship with the other of said plates; and electro-magnetic means in the circuit with said plates adapted to move said armatures, the movement of said second named armature being greater than that of the other, said second named armature being separable relative to its coacting plate.

6. In motor mechanism the combination of a support; a flexible resilient plate mounted on said support; a contact mounted on said plate; a second flexibleand resilient plate mounted on said support; a coacting contact on said second plate adapted to normally engage said first named contact, a stop mem ber mounted on said second plate and movable therewith; a stationary stop plate adapted to cooperate with said movable stop; and electrical means connected in the circuit with said contacts for moving said movable stop and contacts towards the stop plate. 7. In motor mechanism the combination of a support; a flexible resilient plate mounted on said support; a contact mounted on said plate; a second flexible and resilient plate mounted on said support: a coacting contact on said second plate adapted to normally engage said first named contact, a stop member mounted on said second plate and movable therewith; a stationary stop plate adapted to cooperate with said movable stop; and electrical means connected in the circuit with said contacts for moving said movable stop and contacts towards the stop plate and to separate said contacts,

In testimony whereof, I aflix my si DON D.

ature. RS. 

